Getty Images / David Cannon, YouTube screencap
But for every epic bomb like "Gigli," which starred Ben Affleck and Jennifer Lopez - and earned a distinguished 6% on Rotten Tomatoes - there are some hits that have made major piles of cash.
Box Office Mojo compiled a list of the highest-grossing movies that starred actors who were dating in real life, either at the time of the movie's release or shortly before. (The list is ranked based on the movies' domestic box office, without adjusting for inflation.)
Most of these couples are no longer together, but there are a few exceptions, such as Catherine Zeta-Jones and Michael Douglas who have been married for 18 years.
There are also couples who have starred in multiple movies together (Tom Cruise and Nicole Kidman), and actors who have starred in multiple movies with a different significant other (Cruise again).
Overall, it appears that Cruise enjoys dating his co-stars.
Below are the most successful movies to star people who were dating in real life: